Centrifugal pump



May 1, 1928. 1,668,183

- A. w. ALBREcHT CENTRIFUGAL PUMP Sheets-Sheet 1 Filed AuE. 18, 19

I May 1, 1928.

A. W. ALBRECHT CENTRIFUGAL PUMP 2 M@ .a n m ww W w M dn W 0%? m f n yFil'ed Aua.18, l

Patented May l, 1928.

UNITED STATES PATENT OFFICE.

ALBERT W. ALBRECHT, F UNIVERSITY CITY, MISSOURI.

CENTRIFUGAL PUMP.

Application led August 18, 1924. Serial No. 732,840.

I centrifugal' pump with a battle plate ad@ justably supported adjacentto the outletfrom the pump. and means for supporting the lbattle platein selected adjustments with respect to the rotor to regulate theoverthrow of the lid/uid about the rotor.

Additional advantages of the construetion will be apparent from theVfollowing detailed description taken in connection with the accompanyingdrawings, in which:

Fig. 1 is an end lelevation shown on the line 11 of Fig. 4.

Fig. 2 is a cross section through the pump .taken substantiallyon theline 2 2 of Fig. 4.

Fig. 3 is a cross section taken substalb tially on the line 3-3 of Fig.1.

Fig. 4 is a front elevation of the pump, portions being broken away toshow the main shaft bearings and lubricating system therefor.

Fig. 5 is a Fig. 4.

section o'n the line 5-5 of Fig. 6 -is a sectlon-on the line 6-6 of Fig.4.

trated in the drawing the pump is shown as mounted on a base comprisingparallel arranged I-beams 1 which support the pump housing and thebearings for the main shaft. The stator of the pump housing.V comprisesthe substantiallycylindrical casting 2 which is e uipped with integrallycast supporting brac ets 3 bolted to the supporting members 1. Thecasting ,2 has integrally formed and downwardly extending annular{ianges 4 to which end plates 5 and 6 are secured by bolts 7.

Axially located with respect to the end plate 5 and bolted thereto bybolts 8 is a flanged inlet fitting 9 to which the pump supply or suctionpipe is connected. The inner periphery of the pump housing hassectionaLsteel liner plates 10 secured thereto, said liner platescovering the ninner surface of the periphery wall and extending,upwardly against the inner surface of the outlet conduit 11 which isintegrally cast with the housing.

The stator is equipped with a bleek 12 the outer face of which matchesthe inner peripheral wall of the stator housing. The

In the embodiment of the invention illus-n block has a vertical wall 13which, throughout its length, is in longitudinal continuation of theadjacent portion of the wall of the outlet passage from the pump. Theinner face of the block is curved forming a wall 14 that meets the wall13 and thereby forms a sharp edge adjacent to the periph-V ery of therotor. The block is held in place 'in the stator housing by adjustablescrews 15 that operate in slots 16 through the wall of the housing.cated in selected adjustments so that the edge thereof is spacedselected distances from the periphery of the rotor. This blockconstitutes an adjustable baiiie wall that prevents the liquid or othermaterial Thus the'block may be lo drawn into the pump from passing inthe vspace beyond the out-let opening and between the inner face of thelhousing and the periphery of the rotor. Where the opening beyond theoutlet opening from the stator housing and between the rotor and thestator is unobstructed there VAis an overthrow of material beyond theoutlet opening which reduces the eflicieneyl of the pump. The provisionof the block battling this space results in an increase inthe etliciency0f the apparatus. 'j

The rotor of the pump is supported on a power shaft 17, said shaft beingmounted in external bearings 18 carried by I-beam brackets 19 supportedon the members 1, and -a bearing 20 carried by the stator housing. Theshaft 17 passes through the stator housing and has bolted to its innerend the hub 21 of the rotor.

The rotor is of known construction comprising 'a shell 22 in which ismounted a series of curved vanes 23. In order to take up the spacebetween the rotor shell andan end wall of the stator housing, therebypreventing vibration, an improved end thrust mounting for the shaft 7 isprovided. This mounting comprises the bearing 20 that is made up of twosections 24 and'25. The section-24 has an arcuateiang'e 26 and thesection 25 has an arcuate flange 27 matched bolts 32 the collar 29 maybe moved toward and away from the bearing 20. As the collar 29 is movedoutwardly by the adjustment of the bolts 32 pressure is exerted on thediscs which are forced against the collar 30, drawing the shaftoutwardly taking up the space between the rotor and the stator.

The bearings for the shaft 17 are of special construction, the bearing2() comprising a bearing housing 33 in which is mounted a journalbearing 34. The bearing housing 33 has a recess at its inner end inwhich is placed packing material 34. In Athe outer end of the bearinghousing is a packing gland 36 with packing material 37 at the inner endof the gland The gland is taken up by screws 38 which pass through themember 36 and into the end of the bearing housing. The bearings are ofsimilar construction and all of the bearings have a special lubricatingsystem which comprises oil cups 39 mounted in the top wall of thebearings and discharging through openings onto the top face of the shaftand a second set of oil cups 40, said oil cups 40 connecting into thelower bearing member,' which lower bearing member has a series of branchpassages ll, the openings of which lie against the under face of theshaft. The oil is fed by gravity in this manner against both the upperand lower faces of the shaft, eli'ecting etiieient lubrication of theshaft in the bearings.

The pump is equipped also with an ejector conduit 42 that enters theupper part of the stator housing, said ejector being controlled by avalve 43 for priming the pump.

It will be noted that the end plates or heads of the pump are soarranged that they may be interchanged on the stator housing, thus thepump may be made a right or left hand pump merely by reversing the endplates and reversing the position of the rotor blades. i

I am aware that the invention may be v modified in certain particularswithout departing from the spirit and scope thereof. I do not limitmyself therefore to the exact details shown and described, but

lVhat I claim and desire to secure by Letters Patent is l. A centrifugalpump comprising an approximately circular housing having an outletpassage, a rotor mounted in the housing and extending approximately tothe plane of the axis of said outlet passage, a block withinthe housinghaving a sharp edge extending toward the rotor adjacent to said outletpassage, and means for supporting said block in selected adjustments tovary the distance of the sharp edge of said block from the periphery ofthe rotor.

2. A centrifugal pump comprising an approximately circular housinghaving an outlet passage and having slots through the wall thereof at adistance from said passage, a rotor mounted within the housing. a blockwithin the housing adjacent to said out-let passage having a sharp edgeextending toward said rotor, and bolts extending through and beingadjustable laterally l in said slots and engaging and supporting saidblock, the positions of said bolts in'said slots determining thedistance of the sharp edge of said block from the periphery of therotor.

ALBERT W. ALBRECHT.

